I got the kit from iboats.com (need the www. in front) for the purpose of this post did not want their ad form to pop up. The kit came in a blister pak, all parts including push rod. If in doubt they have tel no for inquiry.

Cost with shipping under $100.

Just be sure to pick the right kit for your pump model. I'm sure it is available from camping/trailer suppliers as well.

Your water flow should be almost as good as the average campground system. If it is not I would look into Andy's suggestion of a rebuild kit to make sure the pump valves are not leaking back to the tank and reducing the pressure.

I have been reading and reading trying to find someone that has found a cure for my problem. It matters not whether I am on city water or on the pump I get a surge of water when I first turn on the faucet and then it reduces to a slow stream. This is in the shower. bath and kitchen. I have cleaned all filters and screens that I have with no results. I detached the hose from the pump and tried to blow with a compressor but I seem to have a restriction somewhere....or maybe a valve that I have not found.Seems the system needs some Avidar! HELP86 345Pete

Yes you do have a restriction. Any time the initial flow is high and then drops off that is a classic indication of a restriction.

Not sure what year your trailer is but if it is old enough to have copper pipe I would look for a bent pipe that has almost collapsed. If the problem is only on the hot water side I would look at the connections at the rear of the heater for a build up of calcium across the pipe. If it effects both hot and cold you are just going to have to cut into the system at different points until you are past the restriction and replace some piping. There is most likely some foreign matter in there.